schofield



(No Model.) 2 Sheets-Sheet 1.

W. SGHOPIBLD. AUTOMATIC RBVBRSING MEGHANISMFORLAPPING MACHINES. No 293,790. I 5 -Pa.tented Feb. 19, 1884,

W] T NESSESL JNVENTOR @MMW gzawv W4 A TTORNEY I 2 Sheets-Shed W. SCHOPIELD.

' m5 Model.)

ERSING MECHANISM FOR LAPPING MACHINES.

' A TbmTIdRBv Patented Feb. 1-9.-1884.- V

u mq U i l ATTORNEY HITNESSEb:

UNITED STATES PATE T OFFICE.

WILLIAM SGHOFIELD, or PHILADELPHIA, AssIeNoR TO ELLENsoI oFIELD,

OF MANAYUNK, PENNSYLVANIA. I

AUTOMATIC REVERSING MECHANISM FOR LAPPlNG-MACHINES.

SPECIFICATION forming part of Letters Patent No. 293,790, dated February 1 9, 1884. Application filed April 9, 1883. (No model.)

To all whom it may concern: 7

Be it known that I, WILLIAM SonorIELn, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Automatic Reversing Mechanism for LappingMachines, of which the following is a specification, reference being had therein to the accompanying drawings, wherein- Figure 1 is a sectionaldiagram, illustrating my improved mechanism for reciprocating the movable carriage of the lapping machine. Fig. 2 is a detail plan of same.'- Fig. 3 is a detail elevation. Fig. 4 is a horizontal section of the same. Fig. 5 is an elevation of a detail modification. Fig. 6 is a broken detail perspective. Fig. 7 is a detail elevation. Fig.

8 is alongitudinal vertical section of my improved lapping-machine. Fig. 9 is a plan of a modification of operating mechanism therefor, and Fig. 10 is an elevation of detail modification therefor.

My invention has relation to that class of lapping-machines wherein the lap is formed on a carriage or frame which is moved to and from the feed-cylinder, and has for its object to provide improved mechanism for imparting to the carriage a reciprocating motion and means for limiting or varying the extent of such motion so as to produce laps of different widths.

My invention accordingly consists of the novel combination, construction, and arrangement of parts, having reference particularly to the provision of a movable carriage in gear'with driven shaft, whose direction of rotation is reversed by mechanism operated by devices attached to the carriage, said devices being adjustable so as to limit the duration of the revolution of the driven shaft, and thereby determine the extent of the reciprocation of the carriage.

Referring to the accompanying drawings, A represents the movable carriage or frame, and B the'feed-roller, of a lapping-machine, the former being provided with the usual traveling apron, a, and the latter suitably supported in standards I), in the customary way.

I ill Grepresents the driving-shaft, having pulleys c c, and D a driven shaft, having hearings in brackets or standards d d, secured to the floor, base-plate, or other support. Upon the driven shaft are mounted two loose clutchpulleys, E E, held in place by collars or other suitable mechanism. Between said pulleys, and upon said shaft, are located the clutching shoes e c, which are formed on a hub, 6 Said shoes'a-nd hub slide upon the shaft D, and are caused to rotate therewith by means of a spline on said shaft passing through a slot in said hub, as more plainly shown in Fig. 1. The clutch-shoes e einay, if desired, be covered with a leather orv other suitable band, e", so as to obtain increased frictional contact be tween them and the inner peripheries of the flanges e of pulleys E E. The pulleys c and E are connected by an openbelt, F, while a crossed belt, F, passes around the pulleys c and E, so that when the clutch-pulley .E is in engagement with the clutchshoe e the shaft D is rotated in one direction, and when the shoe 6 engages with the clutch-pulley E said shaft is reversely rotated. The engagement of the clutolrshoes with their respective pulleys is effected by a shifting lever, G, pivoted at g to support 9. The end of said lever rests upon a bracket, H, having ashoulder or depression, h, and is provided with a spring, h, which acts to draw said lever end 9? against said shoulder, as shown in Fig. 1, and h is another spring which exerts its force to keep said end'g down upon the edge h of bracket H.

Upon the end of shaft D is placed a wheel, J, which may be of any suitable constructionthat is, it may havea square, oblong, V-shaped, or other groove in its periphery, or said. groove may be helical in outline. Around the wheel J is passed a rope, band, or belt, I, the ends 2' i of which are respectively connected to the ends is k of a bar, K, secured. in any suitable manner to the floor or bottom of the carriage A. The endz' of said band is attached to a staple, pin, or other device, in the end k of bar K, while the end 1" is connected to a hooked end, Id, of a screw, 70*, .in the end 70 of said bar. Said screw it is provided with a nut, k so that by turning the latter proper tension is applied to band I to cause it to move the carriage A to and fro as the direction of rotation of shaft D is reversed.

If desired, a roller-and-ratehet mechanism may be substituted for the screw It, or any other suitable tension device may be employed for band I.

L represents another bar, which is secured to the bottom of carriage A, and it is provided with a slot, Z, in which are secured fingers Z Z by means of bolts Z and washers Z in such manner that said fingers may be adjusted relatively to each other in said slot, as desired. The fingers Z Z travel in a line immediately in front of bracket II, as shown in Fig. 1, and the finger Z is provided with a projecting stud, Z, having an inclined side, Z, the toe Z of which is situated in a plane below the shifting lever G, so that as said stud passes beneath the lever G, as shown in Fig. 2, the latter is lifted above or out of engagement with the shoulder 71. of bracket II, as illustrated in Fig. 6, and is free to shift in one direction under the influence of spring h to move the clutching-shoes e e and effect a change of rotation of shaft D, while finger Z is designed to reversely shift lever G and correspondingly move said shoes and cause said shaft I) to again change its direction of rotation.

As said motion is changed or reversed, the wheel J communicates the same to band I, to cause it to correspondingly move the carriage A or to reciprocate it to and from the feedroller 13. As the carriage reeiprocatcs, the

' the fingers Z Z alternately contact with said lever G, and when the finger Z meets said le ver it is thereby shifted to the right, or into engagement with the shoulder 71, and is so maintained in such position by the spring 71 \Vhen lever G is so shifted, the clutch-shoe c is in engagement with the pulley E, upon which runs the crossed belt F. The motion of shaft D and wheel J is then reversed by said belt and the carriage is caused to travel in the direction of arrow X until the toe Z of stud Z of finger Z passes under the lever G. The inclined side Z of said stud lifts said lever out of engagement with the shoulder 71 whereupon the spring h shifts the lever G to the left, which effects a release of shoe 0 from pulley E and an engagement of shoe 0 with pulley E, upon which runs the open belt F. The shaft D is then rotated in an opposite direction to that described, and the carriage A is moved away from the feed-roller, or in a direction contrary to that indicated by arrow at, until the finger Z again meets and shifts the lever G. The adjustment of the fingers Z Z to and from each other, therefore, limits the extent of travel of the carriage to and from the feed-roller, and thereby determines the width of the lap. The farther apart said fingers are the greater will be the extent of the reciprocation of the carriage and the wider will be the lap, while 011 the other hand, as said fingers are brought together, the travel of the carriage decreases and the width of the lap correspondingly lessens. It will be seen, therefore, that power is transmitted by the open and crossed belts F F from the shaft 0 to shaft D, and that the reversed rotary motion of the shaft D is, by means of wheel J and band I, converted into reciprocating motion for the carriage A, and the extent of such motion is limited by the fingers Z Z, attached to the earriage.

Instead of using the groove-wheel J and band I, a sprocket-wheel and chain or a pinion and rack may be substituted therefor, such rack and pinion being shown in Fig. 5. So too, while I have shown friction clutching mechanism for effecting a reversal of motion of the driven shaft D, I do not limit myself to any particular form or style of such mechanism, as any of the usual or other suitable clutches may be employed; nor do I confine myself to the use of clutch mechanism to effect the result stated, as loose and fast pulleys m m may be substituted therefor, in which case a belt-shifter, m, operated by lever G, will be used for shifting the belts F F tothei r respective pulleys. The bracket 11 may then be formed with two shoulders, h, and both fingers Z Z be provided with the projecting studs Z", and the springs 71 h be dispensed with. Such modification is plainly shown in Figs. 9 and 10.

hat I claim is 1. The combination of a driving-shaft, a driven shaft connected to the driving-shaft and having a revolving wheel upon one of its ends, and mechanism for reversing the motion of said wheel. and a carriage moved backward and forward by the wheel on the end of the driven shaft, and having means for shiftingthe reversing mechanism.

2. The combination of a driving'shaft, a driven shaft connected to the driving-shaft and having a revolving wheel upon one of its ends, and mechanism for reversing the motion of said wheel and carriage, moved backward and forward by the wheel on the end of the driven shaft, and having adjustable means for shifting the reversible mechanism.

In combination with shaft D, carrying wheel J, the carriage A, having band I in gear with wheel J, which moves the carriage backward and forward, means for applying tension to said band, and mechanism for reversing the rotation of said shaft D, substantially as shown and described.

4:. The combination of shaft D, reversing mechanism therefor, lever G, bracket 11, having one or more shoulders, 71, and springs 71 and 71?, substantially as shown and described.

In testimony whereof I affix my signature in presence of two witnesses.

\VILLIAM SCHOFIELD.

Witnesses:

A. ELLwooD J ONES, S. J. VAN S'IAVOREN. 

